X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fstatic_2%2Fs_computation%2Ffqus_drops.ma;fp=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fstatic_2%2Fs_computation%2Ffqus_drops.ma;h=24ba92a09c499df96a40bc98178744e5ad180d94;hb=a454837a256907d2f83d42ced7be847e10361ea9;hp=7c0f79cbad119ed8fd4a02d318cb6f92b08b78c6;hpb=b4283c079ed7069016b8d924bbc7e08872440829;p=helm.git

diff --git a/matita/matita/contribs/lambdadelta/static_2/s_computation/fqus_drops.ma b/matita/matita/contribs/lambdadelta/static_2/s_computation/fqus_drops.ma
index 7c0f79cba..24ba92a09 100644
--- a/matita/matita/contribs/lambdadelta/static_2/s_computation/fqus_drops.ma
+++ b/matita/matita/contribs/lambdadelta/static_2/s_computation/fqus_drops.ma
@@ -20,7 +20,7 @@ include "static_2/s_computation/fqus_fqup.ma".
 (* Properties with generic slicing for local environments *******************)
 
 lemma fqus_drops: ∀b,G,L,K,T,U,i. ⬇*[i] L ≘ K → ⬆*[i] T ≘ U →
-                  ⦃G,L,U⦄ ⊐*[b] ⦃G,K,T⦄.
+                  ⦃G,L,U⦄ ⬂*[b] ⦃G,K,T⦄.
 #b #G #L #K #T #U * /3 width=3 by fqup_drops_succ, fqup_fqus/
 #HLK #HTU <(lifts_fwd_isid … HTU) -U // <(drops_fwd_isid … HLK) -K //
 qed.